Detachable-lens mounting



G. LOWENSTEIN.

DETACHABLE LENS MOUNTING.

APPLICATION Flu-:n SEPT. 2. 1920.

-v 1,435,536' Patented Nov. 14, 1922.

Patented Nov. 14, 1922.

eo'rHann Lownnsfrnrn, or BROOKLYN, NEW YonK'.

DETACHABLE-LENS MOUNTING. 'i

Application ieaseptembefa, i920. 'serial 115.1401661.

To all whom t may concern.'

Be it known that I, Gori-IARD LownNsiniN, a citizen of the United States, residing in the borough of Brooklyn, city of New York, county of Kings, and State of New York, have invented certain new and useful Improvements in Detachable-Lens Mountings, of which the following isa full, clear, and eXact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to lens mountings,

and more particularly todetachable lens.

mountings, arranged so that alens'is readily detachable from the frame work normally supporting same, without the necessity` of using any tools, and .can also'just as readily be replaced.

Arrangements and constructions of lens mountings whereby'a lens'may be readily detached from or attached to the frame are notlnewv in the broad sense lof thev word; devices of this character having been described and claimed by me intwo patents for lens mountings, one bearing No. 914,149, patent-- ed March 2, 1909, and the other bearing No.

1,005,248, patented October 10, 1911.l

The primary object of the present invention is to provide an improved construction. of detachable lens mounting for eyeglasses and spectacles, whereby an absolutely positive and lasting locking action is assured between the lens head and the lens holding stud, and whereby a perfectly rigid connection is'` obtained.

Another object of this invention'is to pro. vide a spring controlled detachable lens mounting the construction of which is such that while suiiicient room is allo-wed for effective play of the spring, the spring itself can be located entirely between thev bridge piece and the lens head, interlocking with the lens head near or at its edge portion,

without projecting on or interfering with the surface of the lens. A still further object of this invention is to provide an improved construction of detachable lens mounting whereby not only is a highlyy eflicient and rigid locking action obtained, but the number of parts employed is reduced to a minimum and the cost of manufacture considerably lessened. A

With these and other objects in View, as will more fully appear as the description proceeds, this invention consists in certain constructions and arrangements of parts as tion between the lens head and the stud, is also blanked and formed integral with the stud and bridge, from thesame piece of sheet metal or wire of suitable'thickness. The simpliiied constructionA of eyeglass frame resulting from my invention can be k embodied in connection with a greatl number of styles of lens mountings, and is suitable for use both in connection with the ordinary lens mounting,v and in connection lwith the so called yfinger piece style of lens mounting. H I y v y In the annexed drawings, I illustratetwo ways of carrying my inventioninto practiceand in the same: y l' Fig. 1 is a detail `side Aview in elevation of a portion of eyeglasses,showing ai lens4 head detachably connectedto its stud;

Figs. 2 and 3 are respectively a detaill side sectional View in elevation and adetail plan view of the lens` and lens head used in the construction shown infFig. 1;

Figs. 4 and 5 are respectively a detail side vView in elevation and a plan View of the stud integral with the spring latch land bridge also in Fig. 1;

Fig. .6 is an'enlarged detail side view in elevation, partly sectioned,'of a device similar to the one shown in Fig 1,' showing the way'of connectingthe lens head to the stud;

partly sectioned, of a similar. device, in which the spring latch acts in a direction opposite to that of the springvlatch shown inthe `other drawings; and

Fig. 8 isl a detail plan'fview of a` locking arrangement built along the lines of the one shown in Fig. 7, where however thespring used in thel construction shown 'Fig Tis 'a detail side'view in elevation,

EE. l ,I

moves on a plane parallel to the surface of n 70 isused in order to providethe ylocking ac- "20 in the body of said stud.

nose 22, provided with a notch 23.

the lens instead ot being arranged crosswise to the same.

Similar characters ot reference indicate corresponding parts in the various figures.

lReferring to the drawings, 10 designates a lens provided with a lens head 11, which is mounted on said lens in any suitable manner, for instance by means of a screw 12. Said lens head is formed with an upwardly projecting lugl, and a downwardly projecting lug 14, respectively pr vided with slots 15, 16. 17 designates the bridge ot an eyeglass or spectacle iframe, which is made out of sheet metalk or wire, integral with a stud 18, and integral also with a latch 19., acting as a spring on account oft `its being obtained by producing a long` slot Said spring latch 19 is provided with a hook formed portion 21, which is adapted to be inserted through slot 15 and to interlock with lug 13 of lens head 11.

-The lowerv part of the stud is termed with Said .nose-22 is adapted to be inserted through slot 16, thereby causing said notch 23 to inter lock with lug 111r of lens head 11.

The manner` of connectingthe two parts together is clearly .illustrated 1n Fig. 6.

lroin the same itappears that in order to attachV the lens to the stud, it is suliicient to insert nose`22 through yslot 16 causing notch 23to interlock with lug 111; then using lug 14 a- Jfulcrum, to cause hook tormedpart 21 of spring 19 to pass through slot 15, causing the depression vof said spring. is soon as part 21 has passed slot 15, the spring will spread out, and part 21, interlocking with lug 13, will rigidly secure the lens to the stud. 211 designates a` hole which may be provided for mounting a. Fulcrum pin, :whenfniy improif'ed construction is used in connection with the linger piece style oil lens mounting. .ln this ligure spring` 19 is s iown atached -at 1.9K to the stud .instead et beingformed -in onepiece with the same. ducn a construction may be adopted when the material ot which the stud is made is .not suliciently resilient, or when an absclutely eliiective tempered spring is wanted.

ln or l r to detach the lens from the stud, it su'n cient to press down spring latch 19 with the thumb nail against part 21j until said part 21 clearing slot 15, the operation can be reversed.

.1n Fig. 7, l illustrate :inodilied form of lens mounting in which the stud 25 is provided with a spring latch 26 having a-hook 'formed portion ,i217 adapted to be inserted through an openingl 2S and to interlock with lug 29 of lens head 30. 1n the present inlessees stance, however, the hook formed portion 2T is directed downwardly, and may be disengaged by lifting the same with the thumb nail, instead of pressing down as explained in connection with the style of device shown in the previous drawings.

ln Fig. 8 l show a style of locking arrangement which `is built along the same lines as the ones previously described, with the dillerence that lens head 31 is provided with lugs 32, 33 extending one. on each side along the edge of the lens instead of cross wise to the same; the stud 311, provided with hook portion 35 and with spring 36being similarly arranged in plane parallel to the surface ot the lens. Ndparticular'advantage'is claimed for this form of constructionl whichis equallyetfective as theones previously shown, and which is illustrated only as an example of optional. alternative construction. i y

From the foregoing, it. is, seen thatl .provide a simple and novel construction of de.- tachable lens mounting, whereby-astrong and positive. spring locking action maybe obtained, and whereby the rigidity ot the .entire construction is assured.through the employment of a minimum number of parts.

l claim: 1. ln a device .of the class described,-the combination of a lens,-a lens headmoun-ted on the same Aprovided with two slots, and a lens holding stud formed in one piece vwith' a notchedmember adapted to interlock with one of saidslots, and with a springyacting member adapted to interlock with the'other slot.

2. ln a device ot the class described, the

combination of a lens, alens head. mounted on the same provided with slots, and a lens holding stud 'adapted to interlock 'withsaid lens head. said stud being 'formed in one piece with a notched portionadapted to, enone oit said slotsl`- and being 'further- ,more provided withy an elongated slot causing said'stud to be termed. into a body portion and a springv acting latch adapted to interlock with vthe remaining slot .in said .lenshead 

